Method and System for Releasing Resources and Evolved Node Base

1. A method for releasing resources, comprising: an Evolved Packet Core (EPC) receiving a detach request from a User Equipment (UE), wherein the detach request carries a Detach Type of the UE; the EPC informing an evolved Node Base (eNB) corresponding to the UE of the Detach Type, wherein the EPC sends a UE CONTEXT RELEASE COMMAND message to the eNB, and wherein the UE CONTEXT RELEASE COMMAND message carries the Detach Type by the following manners: in the situation that the Detach Type is switch off, the UE CONTEXT RELEASE COMMAND message carries (i) an Information Element Cause (IE Cause): switch off detach or (ii) an IE Cause: detach, and carries a sub-IE Detach Type: switch off; in the situation that the Detach Type is normal, the UE CONTEXT RELEASE COMMAND message carries (i) an IE Cause: normal detach, or (ii) an IE Cause: detach, and sub-IE Detach Type: normal; and the eNB cancelling to send a Radio Resource Control (RRC) Connection Release message to the UE in the situation that the Detach Type is switch off; and the eNB sending the RRC Connection Release message to the UE in the situation that the Detach Type is normal.

2. A system for releasing resources, comprising a UE, an eNB corresponding to the UE and an EPC, wherein the UE, configured to send a detach request to the EPC via the eNB, wherein the detach request carries a Detach Type of the eNB; the EPC, configured to receive the detach request via the eNB and inform the eNB of the Detach Type, wherein the EPC comprises a receiving module and a sending module stored on a non-transitory computer-readable medium, wherein the receiving module is configured to receive the detach request and wherein the sending module is configured to send a UE CONTEXT RELEASE COMMAND message to the eNB, wherein the UE CONTEXT RELEASE COMMAND message carries the Detach Type by the following manners: in the situation that the Detach Type is switch off, the UE CONTEXT RELEASE COMMAND message carries an Information Element Cause (IE Cause): switch off detach; and in the situation that the Detach Type is normal, the UE CONTEXT RELEASE COMMAND message carries an IE Cause: normal detach; and the eNB, configured to cancel sending an RRC Connection Release message to the UE in the situation that the Detach Type is switch off.

3. the system according to claim 2 , wherein the eNB is further configured to send the RRC Connection Release message to the UE in the situation that the Detach Type is normal.

4. An evolved Node Base (eNB), comprising: a receiving module stored on a non-transitory computer-readable medium, the receiving module configured to receive a Detach Type of a UE from an EPC, wherein the EPC comprises a receiving module and a sending module stored on a non-transitory computer-readable medium, wherein the receiving module is configured to receive the detach request, and wherein the sending module is configured to send a UE CONTEXT RELEASE COMMAND message to the eNB, wherein the UE CONTEXT RELEASE COMMAND message carries the Detach Type by the following manners: in the situation that the Detach Type is switch off, the UE CONTEXT RELEASE COMMAND message carries an Information Element Cause (IE Cause): switch off detach; and in the situation that the Detach Type is normal, the UE CONTEXT RELEASE COMMAND message carries an IE Cause: normal detach; a scheduling module stored on a non-transitory computer-readable medium, configured to schedule a first determining module stored on a non-transitory computer-readable medium in the situation that the Detach Type is switching off; and the first determining module, configured to determine not to send an RRC Connection Release message to the UE.

5. The eNB according to claim 4 , wherein the eNB further comprises: a second determining module stored on a non-transitory computer-readable medium, configured to determine to send the RRC Connection Release message to the UE; and the scheduling module, further configured to schedule the second determining module in the situation that the Detach Type is normal.